Diagnosing grey mould in narrow-leafed lupins

Grey mould (Botrytis cinerea) is a rare fungal disease that is favoured by warm humid spring conditions or dense crop canopies.

 

Large sunken lesions can girdle stems and branches and kill plants. Mature lesions have grey fuzzy mould

What to look for

    Plant

  • Lesions on flowers and pods in humid spring conditions that cause them to abort.
  • Large sunken lesions that girdle and kill branches.
  • Mature lesions are characterised by grey fuzzy mould that may contain large black sclerotia.

Where did it come from?

Wet or humid conditions
Wet or humid conditions
  • The fungus is hosted by many broadfleaf plants, and survives on infected stubble.
  • Warm moist conditions favour infection, which ceases in dry spring weather.
  • Millions of spores are produced in grey mould that can be wind-borne over large distances

Management strategies

  • This disease may be more common in albus lupins but rarely causes economic damage in WA lupin crops.
Source URL: https://www.agric.wa.gov.au/mycrop/diagnosing-grey-mould-narrow-leafed-lupins
This print version was generated at 4:19pm on the 12th of June, 2024.
The original document was last revised at Fri, 17/04/2015 - 9:09am

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Important disclaimer

The Chief Executive Officer of the Department of Primary Industries and Regional Development and the State of Western Australia accept no liability whatsoever by reason of negligence or otherwise arising from the use or release of this information or any part of it.